Mix Design of Compaction-Free Porous Concrete Permeable Base

2011 ◽  
Vol 368-373 ◽  
pp. 1416-1419 ◽  
Author(s):  
Yan Ping Sheng ◽  
Hai Bin Li ◽  
Bo Wen Guan
Keyword(s):  
Performance Test ◽  
Design Method ◽  
Mix Design ◽  
Construction Technology ◽  
Porous Concrete ◽  
The Road ◽  
Mix Proportion ◽  
Vibration Compaction ◽  
The Stability ◽  
Volume Method

Moisture damage is one of the main forms of early failure in the asphalt pavement. Setting porous concrete permeable base can release water from the road structure. The common construction technology for porous concrete is traditional vibration compaction, which is helpful for the strength formation of the base, but unhelpful for the stability and smoothness of the base.In this sdudy, Compaction-free Porous Concrete (CPC) permeable base was proposed, which can not only satisfies the strength requirement of structures, but also guarantees the stability and the smoothness of the base. The idea of volume method was adopted on mix design of CPC. Mix proportion parameters such as aggregate dosage, cement dosage and water dosage were calculated and confirmed based on experimental study. The performance test results show that CPC designed by this method can satisfy the design standard. Accordingly, the design method of CPC is feasible.

Study on Performance of Normal and Compaction-Free Porous Concrete Permeable Base

2013 ◽  
Vol 723 ◽  
pp. 519-526
Author(s):  
Yan Ping Sheng ◽  
Hai Bin Li ◽  
Bo Wen Guan
Keyword(s):  
Structural Strength ◽  
Construction Technology ◽  
Early Failure ◽  
Porous Concrete ◽  
The Road ◽  
Vibration Compaction ◽  
The Common ◽  
Drainage Capacity ◽  
The Stability ◽  
Good Drainage

Moisture damage is one of the main forms of early failure in the pavement. Water can be released from the road structure by setting porous concrete permeable base. The common construction technology for porous concrete is traditional vibration compaction, which is helpful for the strength formation of the base. However, it is unhelpful for the stability and smoothness of the base during the construction. In this study, compaction-free porous concrete (CPC) permeable base was proposed, which can not only satisfies both porosity and the structural strength, but also guarantees the stability and the smoothness of the base during construction. The performance of normal porous concrete (NPC) and CPC, such as strength, drainage capacity, shrinkage and frost resistance, were studied in the paper. The laboratory tests show that all of them have good performance. In addition, the field evaluations, such as strength, drainage capacity, deflection, smoothness of the base, were tested. The results show that both of NPC and CPC have good drainage capacity, and the strength of NPC is higher than CPC, but the smoothness of NPC is weaker than CPC.

scholarly journals Proposed simplified method of geopolymer concrete mix design

2020 ◽  
Vol 21 ◽  
pp. 31-37
Author(s):  
Ali Abdulhasan Khalaf ◽  
Katalin Kopecskó
Keyword(s):  
Controlling Factors ◽  
Mix Design ◽  
Alkali Activation ◽  
Geopolymer Concrete ◽  
Molar Ratios ◽  
Concrete Mix Design ◽  
Mix Proportion ◽  
Absolute Volume ◽  
Optimal Mix ◽  
Volume Method

The research aims to determine the best combination of the controlling factors that govern geopolymer concrete’s mechanical and physical properties by utilizing industrial waste. Therefore, a review on the controlling factors was conducted. Firstly, it is to identify the controlling factors, namely chemical composition, alkali activation solution, water content, and curing condition. Secondly, understanding the relationship between these controlling factors and the properties of geopolymer concrete. These factors are analysed to the mix proportion components. Finally, a new proportion method is proposed based on combining ACI 211 standard and recommended molar ratios of oxides involved in geopolymer synthesis. The effect of aggregate has been taken into account by applying the absolute volume method in mix design. Based on the results of the study, it is expected to determine the optimal mix proportions based on multi-responses.

A Mix Proportion Design Method of Manufactured Sand Cement Concrete Based on Ultra-Filled

2013 ◽  
Vol 721 ◽  
pp. 420-424
Author(s):  
Guo Ju Ke ◽  
Bo Tian ◽  
Ji Liang Wang
Keyword(s):  
Design Method ◽  
Mix Design ◽  
Experimental Result ◽  
Cement Concrete ◽  
Manufactured Sand ◽  
Mix Proportion ◽  
Plasma Factor ◽  
The Rich

The paper presents a new concept of ultra-filled by studying of classical aggregate filling theory. To resolve the problem involved in mix design with ultra-filled theory, a mix proportion design method of manufactured sand cement concrete is established. By calculation and test, the paper works out the rich plasma factor K1 and K2 of pavement manufactured cement concrete and the experimental result shows that the method is feasible and reasonable.

scholarly journals Analysis of the efficiency of an embedded floor heating for snow melting and freeze protection

2020 ◽  
Vol 207 ◽  
pp. 01008
Author(s):  
Nina Penkova ◽  
Merima Zlateva ◽  
Boian Mladenov
Keyword(s):  
Heat Transfer ◽  
Design Method ◽  
Three Dimensional ◽  
Temperature Fields ◽  
Snow Melting ◽  
Climate Conditions ◽  
The Road ◽  
Flow Parameters ◽  
Road Surfaces ◽  
Volume Method

An algorithm for modelling and numerical simulation of the three dimensional conjugate heat transfer in slab-embedded snow melting and freeze protecting systems is developed. The influence of the climate conditions on the heat transfer in the constructions is modelled according to the correspondent design method of ASHRAE. The models are verified and solved numerically via finite volume method for a road embedded hydronic installation at different piping configurations. The fluid flow parameters and temperature fields in the construction are obtained at steady state climate conditions, hardest for 95 % of the wintertime for the region. An analysis of the efficiency of the modelled configurations is implemented based on the computed snow-free area ratio of the road surfaces.

scholarly journals THE STUDY ON MIX DESIGN METHOD OF POROUS CONCRETE

2008 ◽  
Vol 64 (1) ◽  
pp. 16-28
Author(s):  
Satoshi KAJIO ◽  
Katsuro KOKUBU ◽  
Kimitaka UJI
Keyword(s):  
Design Method ◽  
Mix Design ◽  
Porous Concrete

A Study on the GA-Based Design for Recycled Aggregate Concrete

2013 ◽  
Vol 284-287 ◽  
pp. 1225-1229
Author(s):  
Won Jun Park
Keyword(s):  
Design Method ◽  
Optimization Technique ◽  
Evolutionary Process ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Mix Design ◽  
Aggregate Concrete ◽  
Fitness Functions ◽  
Mix Proportion ◽  
Object Problem

Various desired performances of concrete, i.e. strength, slump, durability, etc., cannot be always obtained by current conventional mix proportion design methods for recycled aggregate concrete (RAC), because recycled aggregate (RA) generally has lower quality than natural aggregate due to the residual cement paste attached on RA and various impurities. On the other hand, design of concrete mix proportion using RA can be solved as the multi-criteria problem to meet the various required performances. This paper suggests a new method for the mix proportion of RAC to reduce the number of trial mixes using genetic algorithm (GA) which has been an optimization technique to solve the multi-object problem throughout the simulated biological evolutionary process. In mix design method by GA, several fitness functions for the required properties of concrete, i.e., slump, strength, carbonation speed coefficient, price, and emission of CO2 were considered based on conventional data or adapted from various early studies. As a result, various optimum mix proportions for RAC that meet required performances were obtained according to assumed case studies.

Mix Design and Road Performance of Strong Interlocked Skeleton Close-Grained Lime-Flyash Stabilized Aggregate

2013 ◽  
Vol 438-439 ◽  
pp. 125-130 ◽  
Author(s):  
Xiao He Xu ◽  
Fan Cao ◽  
Jin Shun Xue ◽  
Ying Jun Jiang
Keyword(s):  
Design Method ◽  
Technical Specification ◽  
Mix Design ◽  
Asphalt Pavements ◽  
Interference Theory ◽  
The Road ◽  
Road Performance ◽  
Dry Shrinkage ◽  
Multi Level ◽  
Shrinkage Coefficient

To improve the road performance of lime-flyash stabilized aggregate (LFSA), mix design method for skeleton close-grained LFSA is proposed by the method of multi-level filling theory and particle interference theory. Road performance of it is verified by indoor test. The results show that the designed LFSA, with the mix design method of strong interlocked skeleton close-grained (SISC) LFSA proposed in this article, has good road performance. Compared with LFSA of the gradation of Chinese technical specification for construction of highway asphalt pavements (CS gradation), the late strength of LFSA of SISC gradation increases 18%, the temperature shrinkage coefficient and dry shrinkage coefficient respectively increase by 15% and 45%, the scour resistance increases by 20%. Therefore, the SISC LFSA has a broad application prospect.

Road Performance Test and Application of TerraZyme Solidification Soil

2013 ◽  
Vol 295-298 ◽  
pp. 452-462
Author(s):  
Lan Gui ◽  
Yue Jun Li ◽  
Zeng Guang Li
Keyword(s):  
Performance Test ◽  
Construction Materials ◽  
Field Tests ◽  
Road Construction ◽  
Engineering Practice ◽  
Construction Technology ◽  
The Road ◽  
New Material ◽  
Road Performance ◽  
Modulus Of Resilience

TerraZyme is a completely different and new material for constructing road compared to the traditional road construction materials. Through the indoor and field tests of TerraZyme solidification soil, the road performance (e.g., unconfined compression strength, CBR value，modulus of resilience, hydraulic conductivity etc) of TerraZyme solidification soil was analyzed systematically. Meanwhile, the changing patterns in the case of various construction technology and different maintenance conditions were discussed. Then, the quality control index and measure for construction were presented. By validating the adaptability of TerraZyme solidification technology in engineering practice, it showed that the technology of TerraZyme solidification soil have many advantages such as no pollution, simple and convenient construction, higher solidified strength, good water stability and lower cost. Therefore, it can be broadly popularized and applied in the engineering practice.

Applied Research on Foamed Asphalt Cold-Regenerating Technique in Overhaul Engineering of Binshi Expressway

2013 ◽  
Vol 477-478 ◽  
pp. 898-903 ◽  
Author(s):  
Hong Yuan Wei ◽  
Wei Feng Zhou ◽  
Jian Yong Sun
Keyword(s):  
Applied Research ◽  
Dry Density ◽  
Control Points ◽  
Construction Technology ◽  
Maximum Dry Density ◽  
Foamed Asphalt ◽  
Mix Proportion ◽  
Optimum Water Content ◽  
Vibration Compaction ◽  
Optimum Water

Foamed asphalt cold-regenerating technique is used to study the overhaul engineering of Binshi Expressway in 2012 (Tianjin Section) to analyze influences of different milling parameters upon the grading difference of materials of recovered asphalt pavement (RAP); and vibration compaction is used to confirm the maximum dry density and the optimum water content of regenerating mixture in the design of mix proportion to provide more reliable control parameters for site construction. Furthermore, site construction technology of cold-regeneration technique is expounded and analyzed and key control points of all links are summarized to offer technical reference for promotion and application of foamed asphalt cold-regenerating technique in Tianjin.

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